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Understanding resolution and scaling

From: InDesign CS5: Print Production Guidelines

Video: Understanding resolution and scaling

Let's take a look at how the Links panel can help us identify the resolution of images and prevent any output issues before they happen. I'm going to open up my Links panel, and in there I went ahead and I added the scaling of it. To do that, I went under panel Options and I clicked on Scale. What that allows me to do is look at the different images with not only the resolution, but also how much they've been scaled. Now we never want the resolution to be less than 200 pixels per inch. So when I scale an image down, that's fine if it has high enough resolution to begin with.

Understanding resolution and scaling

Let's take a look at how the Links panel can help us identify the resolution of images and prevent any output issues before they happen. I'm going to open up my Links panel, and in there I went ahead and I added the scaling of it. To do that, I went under panel Options and I clicked on Scale. What that allows me to do is look at the different images with not only the resolution, but also how much they've been scaled. Now we never want the resolution to be less than 200 pixels per inch. So when I scale an image down, that's fine if it has high enough resolution to begin with.

But if I want to scale an image to a higher resolution, I have to make sure it never drops below 200 pixels per inch. Now, this is with Photoshop files typically. But you can also have scaling issues with Illustrator files. For example, I have an Illustrator file here that's been scaled 37%. Now, normally that would not be an output issue since Illustrator files are resolution-independent. But you run into issues with items being scaled too small, in that you can't see them on the metal plates. Let me show you an example. I'm going to go over to Illustrator, and in here I see that this map has some type in it and also has some lines.

Now my current line has two points. If I scale this 50%, my stroke will be one point, which is just fine. But when I start scaling it too much lower, I run the potential problem of not being able to see that line at time of output. Let me go back to InDesign. In here, when I click on my Illustrator file, I can see it selected in my Links panel, and it tells me it's been scaled 37%. So the thing you have to be concerned about with line art in Illustrator files is that when you scale them, I would be concerned I don't scale them too small and that I can't read the type or the line art that appears in the file.

As far as Photoshop files go, we can scale them, whether they're larger or smaller, but we want to make sure our effect of resolution is always 200 pixels per inch or greater. Using the Links panel, we can see how much images have been scaled and what the resolution of those images are.

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This video is part of

Image for InDesign CS5: Print Production Guidelines
InDesign CS5: Print Production Guidelines

42 video lessons · 15970 viewers

James Wamser
Author

 
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  1. 3m 19s
    1. Welcome
      54s
    2. Using the exercise files
      31s
    3. Asking the right questions before starting your document
      1m 54s
  2. 21m 59s
    1. Building documents correctly
      3m 9s
    2. Understanding facing pages vs. non-facing pages
      2m 8s
    3. Creating a four-page spread with a left-hand page 1
      1m 48s
    4. Creating a gatefold layout
      2m 7s
    5. Creating a letterfold layout
      2m 27s
    6. Creating a book cover layout for a perfect bound book
      3m 11s
    7. Creating a calendar layout
      3m 13s
    8. Creating a drill edge
      3m 56s
  3. 11m 16s
    1. Understanding the preflight settings
      4m 55s
    2. Creating profiles
      2m 26s
    3. Loading and embedding profiles
      1m 18s
    4. Looking at the results
      2m 37s
  4. 10m 13s
    1. Understanding process colors, spot colors, and the Ink Manager
      1m 57s
    2. Using overprint vs. knockout
      1m 46s
    3. Using rich black (percentages of CMYK)
      1m 44s
    4. Checking for unnamed colors
      2m 4s
    5. Using mixed inks and registration
      2m 42s
  5. 4m 25s
    1. Using layers
      2m 25s
    2. Understanding Conditional Text and GREP
      2m 0s
  6. 6m 6s
    1. Understanding document fonts
      1m 33s
    2. Avoiding common font problems
      2m 57s
    3. Choosing the best font formats
      1m 36s
  7. 9m 0s
    1. Looking at the Links panel
      1m 32s
    2. Customizing the Links panel
      1m 56s
    3. Understanding resolution and scaling
      2m 4s
    4. Understanding actual resolution vs. effective resolution
      1m 53s
    5. Choosing file formats
      1m 35s
  8. 6m 47s
    1. Understanding RGB and CMYK
      2m 13s
    2. Using ICC profiles
      2m 13s
    3. Converting from RGB to CMYK during PDF export from InDesign
      2m 21s
  9. 7m 44s
    1. Understanding accurate soft proofing in Acrobat
      2m 32s
    2. Using the Separations Preview panel
      3m 16s
    3. Using the Flattener Preview panel
      1m 56s
  10. 11m 43s
    1. Packaging your files
      2m 0s
    2. Using Adobe PDF presets
      2m 2s
    3. Understanding PDF/X-1a vs. PDF/X4
      3m 20s
    4. Understanding when to create an Acrobat layer
      1m 25s
    5. Using single pages vs. spreads
      2m 56s
  11. 2m 14s
    1. Final thoughts: 10 things to keep your printer happy
      2m 14s

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